As suggested get advice from a benefits advisor.
There will be a few people on the Forum who have been at the mercy of DWP decisions through changes in their circumstances. Hope fully they will give some input.
This is one – Going into a carehome.
If your care home fees are paid in full or part by the local authority, National Health Service (NHS) or other public funds, payment of Disability Living Allowance (DLA) care component, Personal Independence Payment (PIP) daily living component, Adult Disability Payment (ADP) daily living component or Attendance Allowance (AA) will stop after you have been in a care home for 28 days.
It is different if its a Respite Home or Centre, there is a DS1500 form if the recipient is not expected to live beyond a year, and requres a form from a doctor.
Anything to do with the DWP, and Benefits is a minefield….seek professional advice.